The use of reclaimed rubber production of rubber products has become increasingly common, and latex reclaimed rubber feel good elasticity, elongation at break, often used to replace natural rubber to produce rubber products. However, some of the requirements of the "harsh" rubber products, the use of latex reclaimed rubber produced in the hardness can not reach, then how to solve it?
1, add carbon black
Carbon black rubber filler can be used as a filler to make the hardness of rubber products change, is to improve the hardness of the rubber material of choice. (Hard carbon black should be chosen when choosing carbon black because our purpose is to increase the hardness of rubber reclaimed rubber products such as N110, N220, N330)
2, increase the resin
Latex reclaimed rubber products formula to add the appropriate resin can also play to increase the hardness of the rubber effect.
3, add calcium carbonate
Calcium carbonate is one of the largest filler of rubber products used in latex reclaimed rubber products filled with large amounts of calcium carbonate, can significantly increase the hardness and wear resistance of rubber products; calcium carbonate inexpensive, as a filler can save rubber, Reduce raw material costs.
4, add high styrene
High styrene itself has good mechanical properties and flexibility, and natural rubber, butadiene rubber and styrene-butadiene rubber and so have good compatibility both reinforcing and hardening role.
5, add benzoic acid
Benzoic acid, commonly known as benzoic acid, the proportion of about 1.27, the melting point of not less than 120 ℃, often added to the natural rubber and synthetic rubber as anti-coke agent can significantly increase the vulcanization accelerator vulcanization critical temperature and increase the rubber resistance Scorch performance, improve the hardness of reclaimed rubber products immediate.
6, add sulfur
In the production of latex reclaimed rubber formulations formulation, other raw materials remain unchanged, adding the appropriate amount of sulfur can increase the hardness of rubber products to some extent. (100 parts of plastic, the highest amount of sulfur 4 to 5 copies)
7, reduce the amount of rubber oil
Rubber products added to the role of rubber is softened, heated expansion of rubber products, reducing the interaction between polymers. The reduction of the amount of rubber oil equivalent to reduce the softening effect of rubber products, played from the side to enhance the role of hardness.
If you need to improve the hardness of rubber reclaimed rubber products, may wish to try our engineers give these seven coup! Of course, if you have any better way to improve the hardness of rubber products, welcome to exchange. For other types of reclaimed rubber products to increase the hardness of the method can refer to this article.
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